import module namespace page="http://sendmeafilter.com/common/page" at "common/page.xqy";
page:info('About MERV Filter Ratings')
(:
import module namespace header="http://sendmeafilter.com/common/header" at "common/header.xqy";
import module namespace footer="http://sendmeafilter.com/common/footer" at "common/footer.xqy";
import module namespace why="http://sendmeafilter.com/common/whychooseus" at "common/whychooseus.xqy";
import module namespace meta="http://sendmeafilter.com/common/meta" at "common/meta.xqy";
import module namespace terms="http://sendmeafilter.com/common/terms" at "common/terms.xqy";

(
	header:doctype(),
	
<html lang="en"><!--<![endif]-->
<head>
  <title>About Merv Ratings - SendMeAFilter.com</title>
	{
		meta:meta()
	}

	<meta name="description" content="Understanding MERV Ratings MERV ratings are used to rate the amount of dust that can pass through an air conditioning filter. In today&amp;rsquo;s HVAC world"/>
<meta name="keywords" content=""/>
<meta name="generator" content="GetSimple"/>
<link rel="canonical" href="http://sendmeafilter.com/index.php?id=about-merv-ratings"/>
	
</head> 
<body id="about-merv-ratings">
	{
		terms:terms()
	}
	<!-- site header -->
	{
		header:header()
	}	
		<div id="main-body">
			<div class="wrapper">
				<div class="page-style">
					<h3>Understanding MERV Ratings</h3>
					
					<p>MERV ratings are used to rate the amount of dust that can pass through an air conditioning filter. In today’s HVAC world
					a MERV rating acts as a standard to measure the overall efficiency of a filter. The higher the MERV rating is, the fewer
					dust particles and other airborne contaminants are allowed pass through the filter. MERV (Minimum Efficiency Reporting
					Value) was developed by ASHRAE (American Society of Heating, Refrigerating and Air Conditioning Engineers) under
					Test Standard 52.2-1999.</p>
					
					<p>MERV ratings range from 1 - 16 and are measured in microns. A micron is a unit of linear measurement equivalent
					to one millionth of a meter. 1 Micron=Approximately 1/25,400 inches (A human hair is approximately 150 microns in
					diameter)The chart below shows common types of particles that are captured according to the MERV Rating.</p>
					<h4>Merv 4 and less</h4>
					<p>Filters with MERV ratings of 4 or less are the most common filters used in residential settings. These are typically low-
					quality flat-panel filters that only capture the largest of airborne contaminants (particles smaller than 10 microns).</p>
					<h4>Merv 5—8</h4>
					<p>Filters with MERV ratings of 5 to 8 are commonly found in commercial setting, however, they are a much higher quality
					filter and work very well in a residential environment.</p>
				
					<h4>Merv 9—12</h4>	
					<p>Filters with MERV ratings of 9 to 12 are commonly found in 
				commercial as well as industrial settings. These filters are
					the best choice for residential use due to the large list of airborne 
				particles and contaminants that are captured and held. It is
					important, however, when using these higher-rated filters to change 
				them frequently (per manufacturer’s recommendation).
					Since these filters capture so many particles they will become dirty 
				more quickly which can decrease the efficiency of your
					furnace / air conditioner.</p>
					<h4>Merv 13—16</h4>
					<p>Filters with MERV ratings of 13 to 16 are commonly found in 
				hospitals and other super clean environments. While these
					filters can be used in a residential setting it is not as 
				cost-effective as lower-rated filters due to the frequency with-which 
				the
					filters need to be changed.</p>
					
					<table class="ratingTable">
						<tbody><tr>
							<th>Standard MERV Rating</th>
							<th>Particle Size (Microns)</th>
							<th>Typical Controlled Contaminant</th>
						</tr>
						<tr>
							<td>13+</td>
							<td>.30-1.0</td>
							<td>All bacteria; most tobacco smoke; droplet nuclei (sneeze)</td>
						</tr>
						<tr>
							<td>9-12</td>
							<td>1.0-3.0</td>
							<td>Legionella; humidifier dust; lead dust; milled flour; auto emissions; welding fumes</td>
						</tr>
						<tr>
							<td>5-8</td>
							<td>3.0-10.0</td>
							<td>Mold spores; hair spray; fabric protector; dusting; cement dust; pudding mix</td>
						</tr>
						<tr>
							<td>4-</td>
							<td>10.0-25.0</td>
							<td>Pollen; dust mites; sanding dust; spray paint dust; textile fibers; carpet fibers</td>
						</tr>			
					</tbody></table>
				<p>
				<a href="/carbonorder" class="button-class">Order A Carbon Filter Now</a>
				<a href="/merv8order" class="button-class">Order A Merv 8 Filter Now</a>
				<a href="/merv11order" class="button-class">Order A Merv 11 Filter Now</a>
				</p>
				</div>			
			</div>
		</div>
	{
		why:whychooseus()
	}			
<!-- include the footer template -->
	{
		footer:footer()
	}
	<div id="gray-box"></div><!-- Modal Gray Box -->

</body>
</html>
)
:)